A Poster-Size Image of the Beautiful Barred Spiral Galaxy NGC 1300

January 10, 2005: One of the largest Hubble Space Telescope images ever made of a complete
galaxy is being unveiled today at the American Astronomical Society
meeting in San Diego, Calif. The Hubble telescope captured a display of
starlight, glowing gas, and silhouetted dark clouds of interstellar dust
in this 4-foot-by-8-foot image of the barred spiral galaxy NGC 1300.

Q & A: Understanding the Discovery

1.
What is a barred spiral galaxy?

Barred spirals differ from normal spiral galaxies in that the arms of the
galaxy do not spiral all the way into the center, but are connected to the
two ends of a straight bar of stars containing the nucleus at its center.
NGC 1300 is considered to be prototypical of barred spiral galaxies.

2.
How does the nucleus of NGC 1300 look different from other spiral galaxies?

In the core of the larger spiral structure of NGC 1300, the nucleus shows
its own extraordinary and distinct "grand-design" spiral structure that is
about 3,300 light-years long. Only galaxies with large-scale bars appear to
have these grand-design inner disks  a spiral within a spiral. Models
suggest that the gas in a bar can be funneled inwards, and then spiral into
the center through the grand-design disk, where it can potentially fuel a
central black hole. NGC 1300 is not known to have an active nucleus, however,
indicating either that there is no black hole, or that it is not accreting
matter.